Spring.



F. C. GIVENS.

SPRING.

APPLICATION FILED NOV. 3. 1914.

Patented Apr. 6,

WITNESSES Be it known that I, FRANK resin: 0. GIVENS, or ruonumnn, catrronnm.

Specification of Letters Patent.

Patented Apr. c, 19156 Application filed November 3, 1914. Serial No. 870,092,

To all-whom it may concern C. GIvENs, a

citizen-of the United States, and a'resident of Tuolumne, in the county of Tuolumne and .State of California, have lnvented certain new and useful Im rovements in, Springs, of which the following is a specification My invention relates to springs, partlcu larly to extensible springs having'a contractile effect, and one of the main objects thereof is to provide such springs WhlCh allow extension up to a definite point but beyond which will result in breakage of the parts. 15

A further object is to provide such springs which will always return to initial position when relieved of tension.

A further object is to form the spring of two members in pivotal connection having two oints of applied strain and being extensihle'alonga line perpendicular to a line taken through the pivotal points; and further objects are to provide such springs which are simple in construction, which'are ada 'ted' for o jeets whose movement it is des1red to limit, and which are very inexpensive.

' M invention' is fully described inthe following specification, "of ,which the accompanying drawings form a part, in which the separate parts are designated by the same reference characters in each of the views,

' and in which Figure l is a side view of one form of the spring in operative connection with a plv- ,oted lever; and Fig, 2 is a rear view of the spring alone.

In the drawings forming a part of this ap lication I-have shown one form of embo 'ment of my invention, comprislng a member3 coiled upon itself centrally at 4- and formed into arms 5 and6, each of which is provided with an eye 7, and a member 8 centrally' coiled upon itself at 9 and formed into arms ;10 and 11 having, each, an eye 12 engaged with the corresponding e e7, and the tendency of the members is to raw the arms thereof into line, and thus, jointly, drawing'thecoils 4 and 9 into contact.

In 1 I have shown a fixed support,1 3

having an arm 14 secured thereto and to 'the outer end of which, at 15, is ,pivoteda lever 16 engaged with a ring 17 passed within the coil 9, Whereas a similar ring 18 is secured to the fixed support and passed within the coil 4, the spring maintaining the lever in the position shown in full lines when no tenslon is applied thereto. When tension is so applied, the lever may move to the position indicated by dotted lines, at which time the arms of each member 3 and 8 are in line, the" arm 5 with the arm 10, and the arm '6 With the arm 11, and no further extension-of the spring is possible without breakage or separatlon of the members thereof, and the lever movement is stopped.

When the tension on the lever is, relieved, the resiliency of the wire or other material of. the spring members, at the coils thereof,

. returns the spring members, and therefore the lever, to initial positions. I

I may form my members of any suitable material, of any desired conformation, sinuas means for preventing extension servin 5 spring beyond a fixed polnt.

of sai be made, as

'85 pivotal connection having arms thereon' 2. A spring comprising two members having, each, a coil therein forming arms on each side of said coil, said arms being-in pivotal'connection, and serving as limiting means to the extension of said spring.

3. A spring com rising two members having, each, a coil ormed centrally therein to form oppositely'directed arms, each 0 said arms being foamed into an eye, and corresponding eyes bein engaged to lock. the respective armstoget er, said arms serving as limiting means for the extension of sai 4. I spring comprising two members hav ing, each, a coil centrally thereof, oppositely In testimony whereof I have signed my directed arms having, each, an eye formed name to this specification in the presence of 10 at this; end thereof and the ccarresponding two subscribing Witnesses. v

eyes ein in engagement, an a rin in each of s id coils, the line of extensioi i of FRANK GIVENS' said spring being on a line bisectingand Witnesses:

perpendicular to a line drawn through the WM. J. MANN,

connections of opposite arms. JOHN J. KEATING.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

